Probing Physics beyond the Standard Model with He/Xe clock comparison experiments

TL;DR

This paper uses He/Xe clock comparison experiments to search for tiny nonmagnetic spin interactions, setting new limits on Lorentz invariance violations and probing physics beyond the Standard Model.

Contribution

It introduces a novel experimental approach using co-located 3He-129Xe spins to test for Lorentz invariance violations in the context of physics beyond the Standard Model.

Findings

Established new limits on Lorentz invariance violating interactions.

Demonstrated the sensitivity of He/Xe clock comparison experiments.

Probed for relic background fields permeating the Universe.

Abstract

The comparison of the free precession of co-located 3He-129Xe spins (clock comparison) enables us to search for very tiny nonmagnetic spin interactions. With our setup we could establish new limits for Lorentz invariance violating interactions of spins with a relic background field which permeates the Universe and points in a preferred direction in space.